How to make web-push notifications in the corporate network?

Question

PHP

There is a web application (website) available only within the company's network, is it possible to make a web-push notification that would notify that it has been entered into the database?
If yes, what to use for this.
In fact, there is no external access, not from clients, not from the server.

Answer 1

With a completely cut off access to the Internet, push notifications will probably not work at all. You might be better off using websockets.